It frightens me when I speak to art students and graduates who don't have any concrete goals for where they want to go with their art. It terrifies me how many of them end up serving coffee and barely doing any art at all. I try to tell them to look around at what other people are doing successfully and model their approach on that.
Set a lot of short term, achievable targets, and one or two nuttier ones. Just make your mind up, no one is going to put you in prison for falling short. When you're working during the day, throwing mud at the wall and seeing what sticks in the evening will soon use up what little energy you have left. Making a decision, and knowing roughly where you're going, lets you spot specific opportunities when they arise. What's the worst that could happen?